<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title> </title>
<style>
    .hidden{
        visibility: hidden;
        position: absolute;
    }
</style>
</head>
<body style="height:1500px;">
    <ul id="menu">
        <li>123</li>
        <li>234</li>
        <li>567</li>
    </ul>
</body>
</html>
